Patents by Inventor Rune G. Franzen

Rune G. Franzen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for screening or fractionation
    Patent number: 4619761
    Abstract: An improved method for screening and fractionation. By using a housing interiorly divided by a screen plate into a primary and a secondary chamber with the secondary chamber further divided by a fluid impermeable wall, a process fluid stream containing particulate material has a second and a third process fluid stream diverted from it. The second stream is outputed from the housing while the third stream is recirculated to the first chamber. It is demonstrated that high screening or fractionation efficiency is obtained by this method.
    Type: Grant
    Filed: December 20, 1984
    Date of Patent: October 28, 1986
    Assignee: Koppers Company, Inc.
    Inventor: Rune G. Franzen